A processing device for waste lithium battery pole pieces

Abstract

The utility model discloses a kind of processing equipment for waste lithium battery pole piece, including heating cylinder and fixedly connected inside inner cylinder, the heating cylinder top left side is designed with air inlet and feed inlet respectively, the heating cylinder bottom is fixedly connected with base, further include: exhaust mechanism: the exhaust mechanism includes fixedly connected in the inner cylinder top exhaust pipe, the exhaust pipe top end is fixedly connected with connecting seat, the exhaust pipe inside is fixedly connected with fixed frame, the fixed frame top is rotatably connected with fan blade, the fixed frame bottom is rotatably connected with cleaning brush, the cleaning brush bottom is provided with filter cover;Stirring mechanism: the stirring mechanism is arranged in the inner cylinder inside.The processing equipment for waste lithium battery pole piece disclosed in the utility model has the effect of automatic clearing blockage using waste gas kinetic energy, guaranteeing continuous exhaust.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery electrode processing equipment, and in particular to a processing equipment for waste lithium battery electrodes. Background Technology

[0002] High-temperature pyrolysis of used lithium battery electrode sheets is an effective resource recycling and harmless pretreatment technology. In a closed environment with oxygen deficiency or no oxygen, by applying medium to high temperature, the organic binder in the electrode sheet is decomposed or carbonized, and the residual electrolyte, solvent and other volatile components are released by heat, laying the foundation for the efficient recovery of valuable metal materials through subsequent physical sorting and other means.

[0003] However, in existing processing equipment, the volatilized oil and gas mix with solid dust during pyrolysis to form dust-laden gas. Over time, the fine active material dust will quickly adhere to and clog the filter mesh, causing the internal pressure of the equipment to accumulate and increase. This not only hinders the smooth discharge of volatile gases, affecting pyrolysis efficiency and product purity, but also poses a potential safety risk due to excessive pressure. For example, in existing processing equipment, only a stainless steel filter cover is installed at the bottom of the exhaust pipe. When processing a batch of electrode sheets with a high binder content, the thick oil and gas generated by pyrolysis carries a large amount of carbon black and coating powder, which will completely cover and block the surface of the filter cover after a period of time. If it is not cleaned in time, the blockage of the filter cover will severely obstruct the exhaust channel of volatile gases inside the equipment, which will lead to a gradual increase in the pressure inside the cylinder. This will not only change the preset pyrolysis reaction environment, affecting the efficiency of organic matter removal and product quality, but also pose a risk of seal failure or even safety accidents due to abnormal pressure. Utility Model Content

[0004] This utility model discloses a processing device for waste lithium battery electrode sheets, which aims to solve the technical problem that oil and gas volatilized during pyrolysis adhere to and clog the mesh of the filter screen, resulting in the accumulation and increase of internal pressure of the equipment, which hinders the smooth discharge of volatile gases and affects the pyrolysis efficiency and product purity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A processing device for waste lithium battery electrode sheets includes a heating cylinder and an inner cylinder fixedly connected therein. The heating cylinder has an air inlet and a feed inlet on its top left side, and a base fixedly connected to its bottom. The device also includes: an exhaust mechanism comprising an exhaust pipe fixedly connected to the top of the inner cylinder, a connecting seat fixedly connected to the top of the exhaust pipe, a fixed frame fixedly connected inside the exhaust pipe, a fan blade rotatably connected to the top of the fixed frame, and a cleaning brush rotatably connected to the bottom of the fixed frame, with a filter cover at the bottom of the cleaning brush; and a stirring mechanism disposed inside the inner cylinder.

[0006] By adopting the above technical solution, the exhaust process is automated and continuously self-cleaning is achieved. When the high-temperature oil-gas mixture flows through the exhaust pipe under negative pressure, it impacts and drives the fan blades on the fixed frame to rotate. This rotational motion is synchronously transmitted to the cleaning brush located above the filter cover via a rotating shaft. The continuous rotation of the cleaning brush can continuously clean the outer surface of the filter cover, thereby timely peeling off and knocking off solid particles such as dust and carbon black attached to the filter cover mesh, causing them to fall back into the inner cylinder, effectively preventing the filter cover from clogging. The passive self-cleaning mechanism ensures the long-term unobstructed flow of the exhaust channel, not only maintaining the stability of the internal pressure of the equipment and ensuring the full progress of the pyrolysis reaction and production safety, but also reducing the possibility of frequent shutdowns for cleaning due to filter cover clogging.

[0007] As a further embodiment of this utility model: the stirring mechanism includes a rotating drum disposed in the middle of the inner cylinder, a spiral blade fixedly connected to the surface of the rotating drum, a torque motor fixedly connected to the left end of the rotating drum, a semi-circular cover disposed at the right end of the rotating drum, and a pin inserted into the right side of the semi-circular cover.

[0008] By adopting the above technical solution, a synergistic improvement in material heating uniformity, reaction efficiency, and convenient discharge is achieved. During operation, the spiral blades continuously agitate, stir, and axially push the electrode material inside the cylinder. This combined motion first ensures that all electrode material is uniformly mixed and fully contacts the heated inner cylinder wall, avoiding local overheating or incomplete pyrolysis, thus improving thermal energy utilization and processing effect. At the same time, the stirring action disrupts the static accumulation of materials, creating more channels for the escape of internal volatile components and accelerating the release of pyrolysis gases. After the processing is completed, the function of the mechanism can seamlessly switch from "stirring" to "discharging." The continuing to rotate spiral blades, with their inherent conveying characteristics, will stably, continuously, and thoroughly push the processed dried material out from the outlet on the right side of the inner cylinder, completing the automated discharge process.

[0009] In summary, this application includes at least one of the following beneficial technical effects: 1. By utilizing the kinetic energy of the pyrolysis waste gas itself, the cleaning brush is driven to continuously rotate and clean the filter cover, achieving efficient anti-clogging and stable exhaust, which significantly improves the continuity, safety and processing efficiency of the equipment operation.

[0010] 2. Through the integrated design of the spiral blades, the uniform mixing, tumbling and axial conveying of materials are realized simultaneously under the drive of a single power source. This not only ensures the uniform heating and efficient pyrolysis of the electrode sheets, but also realizes the automated and thorough discharge of materials after processing, which greatly improves the automation level and processing efficiency of the whole machine.

[0011] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a processing device for waste lithium battery electrode sheets proposed in this utility model.

[0013] Figure 2 This is a cross-sectional view of the inner cylinder of a processing device for waste lithium battery electrode sheets proposed in this utility model.

[0014] Figure 3 This is a cross-sectional view of the exhaust mechanism of a waste lithium battery electrode processing device proposed in this utility model.

[0015] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle.

[0016] Figure 5 This is a schematic diagram of the stirring mechanism of a processing device for waste lithium battery electrode sheets proposed in this utility model.

[0017] In the attached diagram: 1. Heating cylinder; 2. Inner cylinder; 3. Air inlet; 4. Feed inlet; 5. Base; 6. Exhaust pipe; 7. Connecting seat; 8. Fixing frame; 9. Fan blade; 10. Cleaning brush; 11. Filter cover; 12. Rotary drum; 13. Spiral blade; 14. Torque motor; 15. Semi-circular cover; 16. Pin. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1 to 4A processing device for waste lithium battery electrode sheets includes a heating cylinder 1 and an inner cylinder 2 fixedly connected inside it. The heating cylinder 1 has an air inlet 3 and a feed inlet 4 on the top left side, and a base 5 fixedly connected to the bottom of the heating cylinder 1. It also includes: an exhaust mechanism: the exhaust mechanism includes an exhaust pipe 6 fixedly connected to the top of the inner cylinder 2, a connecting seat 7 fixedly connected to the top of the exhaust pipe 6, a fixing frame 8 fixedly connected inside the exhaust pipe 6, a fan blade 9 rotatably connected to the top of the fixing frame 8, a cleaning brush 10 rotatably connected to the bottom of the fixing frame 8, and a filter cover 11 provided at the bottom of the cleaning brush 10; and a stirring mechanism: the stirring mechanism is located inside the inner cylinder 2.

[0020] Specifically, the volatile gases produced during the pyrolysis process, driven by the negative pressure of the system, gather upwards from the inner cylinder 2 and flow through the filter cover 11 fixed at the bottom of the exhaust pipe 6. Solid particles entrained in the gas are effectively intercepted by the filter cover 11. The clean gas continues to rise through the exhaust pipe 6, and its kinetic energy directly acts on the fan blades 9 rotatably connected to the fixed frame 8, causing the fan blades 9 to rotate. This rotational motion is synchronously transmitted to the cleaning brush 10 located above the filter cover 11 through a shared rotating shaft, allowing the cleaning brush 10 to continuously rotate and clean the outer surface of the filter cover 11. This promptly scrapes away and disperses the dust intercepted by the filter cover 11 and attached to its surface, allowing it to fall back to the bottom of the inner cylinder 2 by gravity. Without stopping the machine or relying on external power, the filter unit is automatically and online cleaned, ensuring the long-term unobstructed flow of the exhaust channel.

[0021] There are four exhaust pipes 6, which are fixedly connected at equal intervals to the top of the inner cylinder 2. The upper end of the exhaust pipe 6 passes through the top of the heating cylinder 1, and the top end of the exhaust pipe 6 is connected to the bottom of the connecting seat 7. The top of the connecting seat 7 is provided with a connection port. The multiple exhaust pipes 6 ensure that the volatile gases generated during the pyrolysis process can be collected and discharged quickly and evenly, avoiding the local accumulation of gases inside the equipment.

[0022] The fan blade 9 and the cleaning brush 10 are connected by a rotating shaft, which enables power transmission between them. The rotating shaft is rotatably connected to the center of the fixed frame 8 via a bearing. The filter cover 11 is fixedly connected to the bottom of the exhaust pipe 6. The cleaning brush 10 and the fan blade 9 are made of high-temperature resistant materials. The high-temperature resistant materials can withstand the high-temperature oil and gas generated by pyrolysis for a long time, ensuring the durability and stability of the self-cleaning function under harsh working conditions.

[0023] Reference Figure 1 , Figure 2 and Figure 5 In a preferred embodiment, the stirring mechanism includes a rotating drum 12 disposed in the middle of the inner cylinder 2, a spiral blade 13 fixedly connected to the surface of the rotating drum 12, a torque motor 14 fixedly connected to the left end of the rotating drum 12, a semi-circular cover 15 disposed at the right end of the rotating drum 12, and a pin 16 inserted into the right side of the semi-circular cover 15.

[0024] Specifically, the torque motor 14 drives the rotating drum 12 and its welded spiral blades 13 to rotate inside the inner drum 2 via a flange connection. The rotation of the spiral blades 13 first generates a strong tumbling and mixing effect on the electrode material inside the drum, ensuring uniform heating of the material, while breaking the static accumulation structure of the material and creating a channel for the escape of internal volatile components; at the same time, the specific rotation direction of the spiral blades 13 gives the material a clear axial propulsion force, which is converted into the circulation and tumbling of the material inside the drum when the discharge port is closed by the semi-circular cover 15 and the pin 16. When discharge is required, the semi-circular cover 15 is opened and the pin 16 is pulled out, and the same rotational motion will continuously push the pyrolysis treated material out of the equipment from the discharge port at the right end of the inner drum 2.

[0025] The rotating drum 12 has drive shafts at both ends. The drive shaft at the left end of the rotating drum 12 is fixedly connected to the drive end of the torque motor 14 through a flange. The torque motor 14 is fixed to the left end of the heating cylinder 1 through a motor base. The drive shaft at the right end of the rotating drum 12 is rotatably connected to the right end of the inner cylinder 2. The rotating drum 12 has a hollow cavity design. The hollow cavity design reduces its own weight, reduces rotational inertia and drive energy consumption.

[0026] The semi-circular cover 15 is hinged to the right side of the heating cylinder 1. Corresponding sockets are provided on the right side of the semi-circular cover 15 and the right side of the heating cylinder 1. The pin 16 is inserted into the socket, and locking is achieved by the cooperation of the pin 16 and the socket, making the opening and closing operation of the discharge port extremely simple and quick.

[0027] Reference Figure 1 , Figure 2 and Figure 5 In a preferred embodiment, the air inlet 3 and the feed inlet 4 are respectively connected to the inside of the inner cylinder 2, the cavity between the heating cylinder 1 and the inner cylinder 2 is filled with heating oil, and a semi-circular discharge port is provided on the right side of the inner cylinder 2.

[0028] Specifically, oil bath heating can achieve gentle, uniform and precise temperature control, avoiding local overheating, which is suitable for the pyrolysis process requirements of lithium battery materials. The semi-circular discharge port on the right side of the inner cylinder 2 matches the rotation and pushing path of the spiral blade 13, which can ensure that the processed material is discharged smoothly and thoroughly, effectively reducing residual material.

[0029] Working Principle: In operation, first close the semi-circular cover 15 on the right side of the equipment and insert the pin 16 to lock it. Inert gas is then introduced into the inner cylinder 2 through the top air inlet 3 to replace the internal air and create an oxygen-deficient environment. Subsequently, the waste lithium battery electrode material to be processed is fed into the top feed inlet 4. After feeding, the heating system is activated to heat the heat-conducting oil in the interlayer between the heating cylinder 1 and the inner cylinder 2. The heat is evenly transferred to the internal material through the wall of the inner cylinder 2. Simultaneously, the torque motor 14 is activated to drive the rotating drum 12 and the spiral blades 13 to rotate slowly. During the heating process, the organic binder and electrolyte in the electrode material decompose and volatilize due to heat. The continuous rotation of the spiral blades 13 tumbles and axially pushes the material, ensuring uniform heating of all materials and promoting the release of volatiles. The dust-laden gas rises to the top of the inner cylinder 2 and is initially filtered by the filter covers 11 at the bottom of each exhaust pipe 6. The gas then enters the exhaust pipe 6, where its kinetic energy drives the fan blades 9 to rotate, simultaneously causing the cleaning brushes 10 at the bottom to continuously clean the outer surface of the filter covers 11, preventing dust blockage and ensuring unobstructed exhaust. The filtered and cleaned dust falls back into the inner cylinder 2, while the purified gas is finally collected and discharged through the connecting seat 7 for further processing. When the pyrolysis process is complete, heating is stopped and the gas is allowed to stand for a moment before the exhaust system is shut down. The right-side latch 16 is opened and the semi-circular cover 15 is rotated to open the discharge port. The torque motor 14 is then restarted. At this time, the spiral blades 13, during rotation, steadily and continuously push the processed dried material out of the equipment from the discharge port on the right side of the inner cylinder 2, completing the entire processing operation.

[0030] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A processing device for waste lithium battery electrode sheets, comprising a heating cylinder (1) and an inner cylinder (2) fixedly connected therein, wherein an air inlet (3) and a feed inlet (4) are respectively designed on the top left side of the heating cylinder (1), and a base (5) is fixedly connected to the bottom of the heating cylinder (1), characterized in that, Also includes: Exhaust mechanism: The exhaust mechanism includes an exhaust pipe (6) fixedly connected to the top of the inner cylinder (2), a connecting seat (7) fixedly connected to the top of the exhaust pipe (6), a fixing frame (8) fixedly connected inside the exhaust pipe (6), a fan blade (9) rotatably connected to the top of the fixing frame (8), a cleaning brush (10) rotatably connected to the bottom of the fixing frame (8), and a filter cover (11) provided at the bottom of the cleaning brush (10). Stirring mechanism: The stirring mechanism is located inside the inner cylinder (2).

2. The processing equipment for waste lithium battery electrodes according to claim 1, characterized in that, There are four exhaust pipes (6), which are fixedly connected at equal intervals to the top of the inner cylinder (2). The upper end of the exhaust pipe (6) passes through the top of the heating cylinder (1), and the top end of the exhaust pipe (6) is connected to the bottom of the connecting seat (7). The top of the connecting seat (7) is provided with a connection port.

3. The processing equipment for waste lithium battery electrodes according to claim 2, characterized in that, The fan blade (9) and the cleaning brush (10) are connected by a rotating shaft, which is rotatably connected to the center of the fixed frame (8) by a bearing. The filter cover (11) is fixedly connected to the bottom end of the exhaust pipe (6). The cleaning brush (10) and the fan blade (9) are made of high temperature resistant material.

4. The processing equipment for waste lithium battery electrodes according to claim 1, characterized in that, The stirring mechanism includes a rotating drum (12) located in the middle of the inner cylinder (2). A spiral blade (13) is fixedly connected to the surface of the rotating drum (12). A torque motor (14) is fixedly connected to the left end of the rotating drum (12). A semi-circular cover (15) is provided at the right end of the rotating drum (12). A pin (16) is inserted into the right side of the semi-circular cover (15).

5. The processing equipment for waste lithium battery electrodes according to claim 4, characterized in that, The rotating drum (12) is provided with drive shafts at both ends. The drive shaft at the left end of the rotating drum (12) is fixedly connected to the drive end of the torque motor (14) through a flange. The torque motor (14) is fixed to the left end of the heating cylinder (1) through a motor seat. The drive shaft at the right end of the rotating drum (12) is rotatably connected to the right end of the inner cylinder (2). The interior of the rotating drum (12) is a cavity design.

6. The processing equipment for waste lithium battery electrodes according to claim 5, characterized in that, The semi-circular cover (15) is hinged to the right side of the heating cylinder (1). Corresponding sockets are provided on the right side of the semi-circular cover (15) and the right side of the heating cylinder (1). The pin (16) is inserted into the socket.

7. The processing equipment for waste lithium battery electrodes according to claim 1, characterized in that, The air inlet (3) and the feed inlet (4) are respectively connected to the inside of the inner cylinder (2). Heating oil is provided in the cavity between the heating cylinder (1) and the inner cylinder (2). A semi-circular discharge port is provided on the right side of the inner cylinder (2).

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